Escape from Monster

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?




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In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
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ABEABB
ABDBAA
------- +
AAFGBDH
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The phrase “thinking outside the box” was popularised from the solution to a topographical puzzle involving 9 dots in a box shape.